Re: [PATCH] thunderbolt: Retain host router DP IN resources during suspend

Sanjay R Mehta
2022-02-18T14:08:40Z

On 2/18/2022 4:43 PM, Mika Westerberg wrote:
> Hi Sanjay,
>
> On Fri, Feb 18, 2022 at 01:11:25AM -0600, Sanjay R Mehta wrote:
>> From: Sanjay R Mehta <sanju.mehta@amd.com>
>>
>> All DP resources are released during suspend and while
>> resuming back DP IN resource is not available, therefore
>> unable to find DP pair to re-establish the DP tunnel.
>
> It should get plug event for the DP IN adapters once the router comes
> back from sleep. Is that not happening here?

Yes, plug event is not happening for the DP IN adapter after resume.

The DP In resources are put into tcm->dp_resources list as part of host
router enumeration. But when it resumes from sleep, there is no plug
event happening for DP IN, hence DP IN resource will not be in
tcm->dp_resources list.

>